Characteristics of bulk

expanded为多孔结构，组织可长入微孔，贴合度与稳定性较好，术后显形、移位风险相对低。

precautions

多孔结构对无菌要求更高，若发生感染处理相对复杂；取出难度也略高于silica gel。这些并非"缺点"，而是操作与护理上更需规范。

For whom

People with thin skin, pursuit of natural fit, and great concerns about silicone may be suitable. Whether to choose bulk should be comprehensively judged based on budget, skin conditions and doctor's experience.

The effect of nasal plastic surgery varies from person to person, and the operation carries certain risks; please choose a regular medical institution and a qualified doctor to fully communicate expectations through face-to-face diagnosis before surgery.